Demonstrate the therapeutic clinical equivalence of two mometasone nasal sprays in the relief of the signs and symptoms of perennial allergic rhinitis, in term of changes at week 8 from baseline of Total Nasal Symptom Scores (TNSS).

MULTICENTER, RANDOMIZED, DOUBLE BLIND, CONTROLLED, CLINICAL STUDY TO DEMONSTRATE THE THERAPEUTIC CLINICAL EQUIVALENCE OF TWO MOMETASONE NASAL SPRAYS IN THE RELIEF OF THE SIGNS AND SYMPTOMS OF PERENNIAL ALLERGIC RHINITIS.

demonstrate the therapeutic clinical equivalence of two mometasone nasal sprays in the relief of the signs and symptoms of perennial allergic rhinitis, in term of changes at week 8 from baseline of Total Nasal Symptom Scores (TNSS). [ Time Frame: 8 weeks ] [ Designated as safety issue: Yes ]

Male and female, 12 years until 65 years old. Subjects with a minimum of 2 years of previous history of perennial allergic rhinitis to at least one perennial allergen at the time the study is being conducted.

Signed informed consent form. For patients under the age of majority the parent or legal guardian should sign the consent form and the child will be required to sign a patient "assent" form.

A score of at least 6 on the TNSS with a minimum score of at least 2 for "nasal congestion" and a minimum score of at least 2 for one of the remaining 3 symptoms.

Subjects capable of recording nasal allergy diary every day.

Exclusion Criteria:

Females who are pregnant, lactating or plan to get pregnant during the study. History of asthma over the previous two years that required chronic therapy (with the exception of occasional acute or mild exercise induced asthma).

Patients with some nasal conditions (i.e. infectious sinusitis, hypertrophic rhinitis), or with clinically significant nasal deformity or any recent nasal surgery or trauma that has not completely healed.

Patients previously treated with mometasone within the previous 30 days Patients who have received anti-allergy immunotherapy (desensitising subjects with increase of allergen challenges) in the previous 2 years or are still receiving this kind of therapy.

Patients with a history of tuberculosis. Patients with glaucoma, cataracts, ocular herpes simplex, conjunctivitis or other eye infection.

The patient has had recent exposure (30 days) or was at risk of being exposed to chicken pox or measles.

Any known hypersensitivity to mometasone, other steroids or any of the components of the study nasal spray.

Planned travel outside of the local area for more than 2 consecutive days or 3 days in total.

The patient has a history of alcohol or drug abuse.

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Please refer to this study by its ClinicalTrials.gov identifier: NCT01702103